Machine regulating means



Jan. 5, 1932. SCHUcHMANN 1,839,416

MACHINE REGULATING MEANS Filed 00*... 24, 1928 Ill INVENTOR mm cnucu ANNthe vibratory relay, and this influences the biasing magnetization ofthe rela with the result that a shift occurs in the limit at which thelatter is caused to res end. As a consequence, the change-over o? thekeeper l5 and thereby the ignition at 9 no longer takes place at thesame otential acting at 7 as previously, but eitiier earlier or later,as the case may be. The result is that the amplitude and the startingpoint of the discharge current flowing in 6 is altered, so that also theaction upon the regulating circuit of 1 by way of 2 is altered in thissense that the change in speed caused by load fluctuations or the likeis counteracted.

In the arrangement shown in Figure 2 a spark 1gap is used instead of avibratory relay. or this purpose, a transformer 23 is connected inarallel to the discharge circuit, whose secon ar is connected with acondenser 22 Whic is discharged through or across a spark gap 21. Thesecharges and discharges are dependent as to phase and amplitude upon theregulating function or quantity, that is to say, upon the potential ofthe tachometer machine 20, the latter for this object influencing thebiasing magnetization of the transformer by means of an auxiliarywinding 24. The other parts in Fi re 2 correspond to those in Figure 1.

he regulation of the ignition time may be insured also in some other Waythan hereinbefore suggested, for instance, by varying the length of thespark gap or by shifting the base of the ignition potential in relation,to e current to be regulated.

The regulating or controlling functions in schemes of the kindhereinbefore disclosed as to their action are otherwise the same as inthe well-known hi h-speed governors.

Having thus described my invention, what I desire to protect by LettersPatent is as follows:

1. A speed regulating system for electric motors comprising, aregulating circuit in parallel with the motor armature, means comprisinga mercury vapor tube and a current source for afiecting said regulatingcircuit and means controlled bythe speed of said motor for controllingthe action of said mercury vapor tube.

2. In an electric motor speed re ulating system, a regulating circuit inpara lel with the motor armature, a mercury vapor tube circuitinductively coupled to said regulating circuit, a source of alternatingcurrent in parallel with said tube circuit, an igniting circuitassociated with said tube means comprising a relay device in series withsaid alternating current source for periodically igniting said tube, aspeed responsive device associated with said motor and means controlledthereby for affecting said relay device in accordance with the motorspeed.

3. A speed regulator for electric motors comprising a regulating circuitconnected with the motor armature a discharge tube in series with acircuit inductively coupled to said regulator circuit, and a source ofalternating current for energizing said tube, 7

an igniting circuit associated with said tube and means comprising apolarized relay circuit for affecting said igniting circuit periodicallyand a motor speed responsive device for affecting said relay circuit inaccordance with the motor speed.

4. A speed regulating system for electric motors comprising a regulatingcircuit in parallel with the motor armature circuit, a mercury vaportube circuit inductively coupled to said regulating circuit, analternating current source for energizing said tube, an igniting circuitassociated therewith comprising a condenser device and a relay adaptedto periodically charge and discharge said condenser device and meanscomprising said alternating current source for operating said relay, aspeed responsive device associated with the motor to be controlled andmeans cont-rolled thereby for affecting said relay in accordance withthe motor speed.

5. In a speed control device the combination with a control circuit, ofmeans for encrgizing said control circuit, including a dis charge tubeand a source of alternating current connected in parallel, saiddischarge tube normally producing a potential which Varies substantiallyas a sine wave and of means for causing said discharge tube to produce apotential which varies as a distorted sine wave.

6. A device, as claimed in claim 5, in which said last named meanscomprises an ignition circuit associated with the cathode of saiddischarge tube on the one hand and with the device to be controlled onthe other hand.

7.'The combination claimed in claim 5, in which the last named meansincludes an ignition circuit adapted to be connected through a vibratoryrelay to a source of potential, said circuit being connected with thecathode of said discharge tube on the one hand and with the device, thespeed of which is to be regulated, on the other hand.

8. A device, as claimed in claim 5, in which the means for causing saiddischarge tube to produce a potential, which varies as a distorted sinewave, includes an ignition circuit comprising a transformer having itsprimary winding adapted to be connected to a source of potential, andits secondary winding connected to the cathode of said discharge tube, arelay circuit connected in parallel with said discharge tube and coupledto said ignition circuit, and a second relay circuit coupled to saidlast named circuit and to the device to be controlled.

9. A device, as claimed in claim 5, in which said last named meansincludes an ignition circuit including a source of potential, a chargingcondenser and the armature of a relay, means for connecting said circuitto V the cathode of said discharge tube, and a relay winding associatedwith said armature and with the device to be controlled.

10. In an arrangement for regulating the speed of rotation of anelectric device, the combination with a control circuit connected withsaid device, means for energizing said control circuit including adischarge tube in parallel with a source of alternating current, saiddischarge tube normally producing a potential which varies substantiallyas a sine wave, and of means for altering the character of said sinewave in accordance with variations in speed of the device to becontrolled including an ignition circuit comprising a condenser and acircuit for char ing said condenser, means for coupling said ignitioncircuit to said discharge tube and a relay operatively interposedbetween the charging circuit and the device to be controlled.

11. A device, as claimed in claim 5, in which said last named meansincludes an ignition circuit coupled to said discharge tube, saidignition circuit having a condenser and a spark gap and means forcharging said condenser including a transformer having one windingconnected with a source of potential which varies in accordance with thespeed of the device to be controlled and a second winding connected withsaid ignition circuit.

12. A speed regulating system for electric motors comprising a controlcircuit including an inductance in parallel with the armature circuit ofsaid motor, a source of potential, a discharge tube in series with saidsource of potential, an inductance in series with said discharge tube,said inductance being coupled to the inductance in said control circuit,a condenser and an ignition circuit including a transformer having onewinding connected to said discharge tube and another winding ada ted tobe connected in series with said con enser, means for charging saidcondenserv including a relay winding connected in parallel with saidsource of potential and a source of direct current potential. anarmature adapted to be actuated by said winding to connect saidcondenser in series with said direct current source of potential, asaturated inductance in series with said relay circuit, a second relaycircuit associated with said first named circuit, and means forenergizing said second relay circuit including a source of potentialwhich varies in accordance with the speed of the motor to be controlled.

13. A speed regulating device for electric motors comprising a controlcircuit including an inductance connected in parallel with the armaturewinding of said motor, an energizing circuit therefore including adischarge tubeconnected in series with an alternating current source, aninductance connected with said discharge tube, and coupled to saidinductance in said control circuit, a charging condenser, a spark gap,an ignition circuit for said discharge tu e includin a transformerhaving a winding connecte with said tube and a second windin connectedin series with said charging con enser through said spark gap, means forcharging said condenser including a transformer having one windingconnected in series with said condenser and another winding connected inseries with said source and means for varying the potential charge ofsaid condenser including a source of potential varying in accordancewith the speed of rotation of said device to be controlled and means forconnecting said source with a third winding in said transformer.

In testimony whereof I afiix In signature.

HANS SCHUC MANN.

